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Avoid warnings in <charconv>

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* include/bits/charconv.h (__to_chars_len): Avoid -Wsign-compare
	warnings.

From-SVN: r276889
This commit is contained in:
Jonathan Wakely 2019-10-11 16:29:50 +01:00 • committed by Jonathan Wakely
parent 8b27c9052b
commit 2bf2dacb35
2 changed files with 10 additions and 5 deletions
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5
libstdc++-v3/ChangeLog
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@ -1,3 +1,8 @@
2019-10-11 Jonathan Wakely <jwakely@redhat.com>
* include/bits/charconv.h (__to_chars_len): Avoid -Wsign-compare
warnings.
2019-10-10 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/91057

10
libstdc++-v3/include/bits/charconv.h
View file

@ -50,16 +50,16 @@ namespace __detail
static_assert(is_unsigned<_Tp>::value, "implementation bug");
unsigned __n = 1;
const int __b2 = __base * __base;
const int __b3 = __b2 * __base;
const int __b4 = __b3 * __base;
const unsigned __b2 = __base * __base;
const unsigned __b3 = __b2 * __base;
const unsigned long __b4 = __b3 * __base;
for (;;)
{
if (__value < __base) return __n;
if (__value < (unsigned)__base) return __n;
if (__value < __b2) return __n + 1;
if (__value < __b3) return __n + 2;
if (__value < __b4) return __n + 3;
__value /= (unsigned)__b4;
__value /= __b4;
__n += 4;
}
}